This glacier has a gigantic cavity and that's not good for the sea level

Whether they're in your teeth or in an Antarctic glacier, cavities are a bad sign. The Thwaites Glacier in West Antarctica has developed a cavity roughly two-thirds the size of Manhattan and about 1,000 feet tall, according to a NASA Jet Propulsion Laboratory study published Thursday. This empty space has the negative effect of speeding up the rate at which the glacier melts and, in turn, how quickly sea levels rise.SEE ALSO: Climate change made these 17 extreme weather events radically worseAn